Respuesta :

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Average rate of change =[f (x₂)-f (x₁)]/(x₂-x₁)

Interval [66,88] which is x₁=66, x₂=88

f (x)=4x³+4
f (x₁)=f (66)=4 (66)³+4=1149988
f (x₂)=f (88)=4 (88)³+4=2725892

Average rate of change =2725892-1149988/88-66
=1575904/22
=71632

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